Add a comment about an inherent race with hardware in the Altera JTAG
UART's low-level console code.
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@ -221,6 +221,9 @@ aju_cons_write(char ch)
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* disconnection.
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*
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* XXXRW: The polling delay may require tuning.
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*
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* XXXRW: Notice the inherent race with hardware: in clearing the
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* bit, we may race with hardware setting the same bit.
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*/
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v = aju_cons_control_read();
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if (v & ALTERA_JTAG_UART_CONTROL_AC) {
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